Dataset: Dorado 2014: Pore water dissolved oxygen from sediment gravity cores, and push cores
Deployment: AT26-09

This dataset contains dissolved oxygen data of pore waters from sediment gravity cores (2014) and push cores collected by Jason (2013) and Alvin (2014). Cores were collected during the R/V Atlantis cruises AT26-09 and AT26-24.

Methods & Sampling

Dataset acquisition description

Sampling took place at Dorado Outcrop off the west coast of Costa Rica in the Pacific Ocean during the R/V Atlantis cruises AT26-09 and AT26-24. For more information about operations of this cruise see the cruise pages which contain links to cruise reports ( AT26-09, AT26-24).

Dissolved oxygen (DO) was measured at-sea in pore waters from sediment gravity cores and cores collected by the submersible ALVIN with a needle-type oxygen optode inserted radially into sediment cores, following published protocols (e.g., Orcutt et al., 2013).

Reference:

Orcutt, B. N., Wheat, C. G., Rouxel, O., Hulme, S., Edwards, K. J., Bach, W., 2013. Oxygen Consumption rates in subseafloor basaltic crust derived from a reaction transport model, Nature Comm., published 27 Sep 2013, pg. 1-8, doi:10.1038/ncomms3539.

Deployment-specific acquisition description

HOBO logger deployed during AT26-09

Data Processing Description

Dataset Processing Description

The data have not been processed further.

BCO-DMO Processing Notes:

* added a conventional header with dataset name, PI name, version date
* modified parameter names to conform with BCO-DMO naming conventions
* blank values replaced with no data value 'nd'
* added approximate lat/lon values for Dorado Outcrop sample site

More information about this dataset deployment

Funding

Award Number	Funding Source
OCE-1130146	NSF Division of Ocean Sciences
OCE-1131210	NSF Division of Ocean Sciences

Instruments

Gravity Corer

Supplied Name:

Supplied Description:

Instrument Type

Generic Name: Gravity Corer

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/51/

Generic Description:

The gravity corer allows researchers to sample sediment layers at the bottom of lakes or oceans. The coring device is deployed from the ship and gravity carries it to the seafloor. (http://www.whoi.edu/instruments/viewInstrument.do?id=1079).

Oxygen Sensor

Supplied Name: ALVIN needle-type oxygen optode

Supplied Description:

Instrument Type

Generic Name: Oxygen Sensor

Acronym: Dissolved Oxygen Sensor

Generic Description:

An electronic device that measures the proportion of oxygen (O2) in the gas or liquid being analyzed

Push Corer

Supplied Name: Alvin push cores

Supplied Description:

Instrument Type

Generic Name: Push Corer

Generic Description:

Capable of being performed in numerous environments, push coring is just as it sounds. Push coring is simply pushing the core barrel (often an aluminum or polycarbonate tube) into the sediment by hand. A push core is useful in that it causes very little disturbance to the more delicate upper layers of a sub-aqueous sediment.

Description obtained from: http://web.whoi.edu/coastal-group/about/how-we-work/field-methods/coring/

ROV Jason

Supplied Name:

Supplied Description:

Instrument Type

Generic Name: ROV Jason

Generic Description:

The Remotely Operated Vehicle (ROV) Jason is operated by the Deep Submergence Laboratory (DSL) at Woods Hole Oceanographic Institution (WHOI). WHOI engineers and scientists designed and built the ROV Jason to give scientists access to the seafloor that didn't require them leaving the deck of the ship. Jason is a two-body ROV system. A 10-kilometer (6-mile) fiber-optic cable delivers electrical power and commands from the ship through Medea and down to Jason, which then returns data and live video imagery. Medea serves as a shock absorber, buffering Jason from the movements of the ship, while providing lighting and a bird’s eye view of the ROV during seafloor operations. During each dive (deployment of the ROV), Jason pilots and scientists work from a control room on the ship to monitor Jason’s instruments and video while maneuvering the vehicle and optionally performing a variety of sampling activities. Jason is equipped with sonar imagers, water samplers, video and still cameras, and lighting gear. Jason’s manipulator arms collect samples of rock, sediment, or marine life and place them in the vehicle’s basket or on "elevator" platforms that float heavier loads to the surface. More information is available from the operator site at URL.

Parameters

Supplied Name	Supplied description	Supplied Units	Standard Name
cruise_id	Cruise identifier	unitless	cruise_id
lat_approx	Approximate latitude of Dorado Outcrop	decimal degrees	lat
lon_approx	Approximate longitude of Dorado Outcrop	decimal degrees	lon
core_id	Core identifier	unitless	core_id
sediment_depth	Depth in core sample	centimeters	depth_core
oxygen	Dissolved oxygen	micromoles per liter (uM)	O2_umol_L
comment	Comment for core and sample depth	unitless	comment

Database

Contribute Data

Dataset: Dorado 2014: Pore water dissolved oxygen from sediment gravity cores, and push cores
Deployment: AT26-09

Dataset acquisition description

Deployment-specific acquisition description

Dataset Processing Description

Database

Contribute Data

Dataset: Dorado 2014: Pore water dissolved oxygen from sediment gravity cores, and push coresDeployment: AT26-09

Dataset acquisition description

Deployment-specific acquisition description

Dataset Processing Description

Dataset: Dorado 2014: Pore water dissolved oxygen from sediment gravity cores, and push cores
Deployment: AT26-09